npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@srascar/galaxy-migrations

v1.0.5

Published

Lightweight migration library in Node.js for NoSQL Document databases

Downloads

53

Readme

Galaxy migrations

What is Galaxy migrations

Galaxy migrations is a lightweight migration library in Node.js for NoSQL Document database. It is originally created to provide field update in Azure Cosmos DB since this is not natively supported. This is where the name Galaxy comes from.

Requirements

Galaxy migrations requires Node.js in version 8 and up

Installation

npm install --save-dev @srascar/galaxy-migrations

Usage

npx galaxy-migration -h

Documentation

Before you start, you will have to create a configuration file.

By default, the command will look for a file called migrations_config.yml at the root of your project. But you can use the --config-file option to specify your own.

Here is an example of config.

migrations_dir: migrations
database:
    connector: azure_cosmos_db
    endpoint: https://localhost.cosmosdb:443/
    primary_key: abcd
    name: my_database
    container: my_container

Note: Only azure_cosmos_db connector is supported for now.

Usage

Create a migration

npx galaxy-migrations generate

This will create a new file in you migration directory. Edit this file and change it to you needs.

// migrations/migration20190712120924.js
...
    checkQueryUp: 'SELECT VALUE count(1) FROM Families f WHERE NOT is_defined(f._migrationVersion),
    queryUp: {
      query: "SELECT * FROM Families f WHERE  f.lastName = @lastName",
      parameters: [
        {
          name: "@lastName",
          value: "Andersen"
        }
      ]
    },
    up: (itemBody) => ({ ...itemBody, transformed: true }),
...
    documentMeta: { idField: 'id', partitionKey: 'id' },

We will only focus on the query up for this example.

  • checkQueryUp: if this count returns 0, the migration is skiped
  • queryUp: both checkQueryUp and queryUp supports a queryspec object (cf Azure documentation https://github.com/Azure/azure-cosmos-js/blob/master/samples/ItemManagement.ts#L58-L67)
  • up: The callback to apply on each item
  • documentMeta: required object with the keys for id and partition key fields

Execute a migration

Migrate up

npx galaxy-migrations execute 20190712120924

Migrate down (eg: rollback)

npx galaxy-migrations execute 20190712120924 -w down

Dry run

npx galaxy-migrations execute 20190712120924 -w up -d

Execute all migrations in the directory (based on the config)

npx galaxy-migrations migrate

Options are the same as execute

Known issues

Some options are only displayed for the parent command

For the list of options that you can apply on all commands, use

npx galaxy-migrations -h

Update a document when your container doesn't have partition key

If your container was created before the implementation of partition key, it is now assigned a default partition key with the path /_partitionKey. See https://github.com/Azure/azure-cosmos-js/issues/261

In order to update a document from this container, in your callback, attach a new property _partitionKey to your items with the value undefined

// migrationXXXXXXXXXXXXXX.js

...

up: itemBody => ({ ...itemBody, _partitionKey: undefined })

...
// Don't forget to specify the DEFAULT_PARTITION_KEY_PATH in the document meta
documentMeta: { idField: 'id', partitionKey: '_partitionKey' },